I think it's good for them to have diffferent spaces depending on what they are doing. I don't like the idea of computers in bedrooms so will tackle that once they are older but I also know that when I was studying/reading, you need to have a quiet isolated place without distraction, so I think a desk in their room is a great idea, along with a dining table that is central as well and then maybe a desk in a central space with a computer (Better get DH chippy to start building our mansion with all these spaces )